As fitted to the earliest versions of the Gibson EB-0 and EB-2 basses from 1958 onwards, and the EB-3 and Epiphone Newport from 1961. The basic construction of the pickup coils did not change, beyond this time, though the covers and means of mounting did. Basses were only fitted with this bakelite cover between 1958 and 1962, after which they upgraded to nickel. The images below show the mounted pickup, a 1961 Gibson EB3 with the pickup cover removed, and the underside of the cover itself.
Black covers were fitted to the EB-0 and the EB-2, until it was replaced by the EB-3 in 1961. The EB-3 cover, however, was silver-coloured, but with very poor-wearing coating; finding one with significant silvering today is very unusual indeed. When nickel covers were introduced, they were immediately fitted to the EB-3, with last stocks of bakelite covers being used up on the EB-0 and Newport. The mounting screw spacing of bakelite covered humbuckers differs from either of the later metal versions; replacing the pickup cover with a non original part would require new mounting holes.
The pickup itself consisted of two coils wound on a metal former sharing an axis perpendicular to the length of the guitar, hence the nickname sidewinder. An Alnico magnet is attached either end of the coils, with polepieces in the very centre. This coils were very heavily wound, producing a loud, fat sound, and having a D.C. resistance of around 30kΩ give or take an ohm or two; in the early days these coils were hand-wound in Kalamazoo, so there is greater variance from pickup to pickup than would be expected today.
Soundclips
Have a listen to a 1961 EB3 neck pickup (more soundclips of this bass here).
List of Gibson bass guitar pickups
Gibson bass pickups for sale
Gibson 1970's Black SB Bass Mini Humbucker Neck Pickup
Glassboro, New Jersey, 080**, UNITED STATES OF AMERICA
$50
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Vintage 70's Gibson Grabber G3 Bass Guitar Pickup
Graham, North Carolina, 272**, UNITED STATES OF AMERICA
$112
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Vintage Gibson Bass Guitar Humbucker Pickup Cover For EB-0 EB-1 EB-3 Circa 60's
Brooklyn, New York, 112**, UNITED STATES OF AMERICA
$125
60s Gibson Bass Guitar Humbucker Pickup Cover EB-0 EB-1 EB-3 Vintage Part
Plano, Texas, 750**, UNITED STATES OF AMERICA
$139
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1970's Gibson EB-3 BASS Pickup Mounting Rings + Screws ORIGINAL Surrounds
Miami, Florida, 331**, UNITED STATES OF AMERICA
$150
Sales tax will be added by Ebay. I will ship most of my items to many countries other than USA, but I ask that all buyers contact me before making a purchase. Foreign buyers are responsible for all of their taxes and customs duties. I will NOT declare lower values or declare items as gifts under any circumstance.... more
1978 Gibson RD Artist Bass Guitar Pickup
State College, Pennsylvania, 168**, UNITED STATES OF AMERICA
$175
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1978 Gibson RD Artist Bass Guitar Pickup
State College, Pennsylvania, 168**, UNITED STATES OF AMERICA
$175
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Vintage 1970's Gibson G-3 Bass or S-1 BRIDGE Pickup 5 41
Cincinnati, Ohio, 452**, UNITED STATES OF AMERICA
$175
70??s EB-3 Gibson USA Mini Humbucker Bass Guitar Pickup Bridge Chrome 4 String
State College, Pennsylvania, 168**, UNITED STATES OF AMERICA
$220
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Vintage 60s 70s Gibson Mini-Humbucker BASS Pickup 6 06 ohms for EB-3 EB-2D #4777
Lafayette, Louisiana, 705**, UNITED STATES OF AMERICA
$250
Vintage 60s 70s Gibson Mini-Humbucker BASS Pickup 6 26 ohms for EB-3 EB-2D #4870
Lafayette, Louisiana, 705**, UNITED STATES OF AMERICA
$250
Vintage 1960's-70s Gibson EB-0 EB-3 or EB-2 Bass Pickup
Portland, Maine, 041**, UNITED STATES OF AMERICA
$269
Gibson USA Thunderbird Bass Guitar Pickup 9 75K
Port Charlotte, Florida, 339**, UNITED STATES OF AMERICA
$270
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Vintage 1970's Gibson S-1 Guitar or G-3 Bass MIDDLE Pickup 5 45
Miami, Florida, 331**, UNITED STATES OF AMERICA
$280
Sales tax will be added by ebay. I will ship most of my items to many countries other than USA, but I ask that all buyers contact me before making ... more
Vintage 1970's Gibson S-1 Guitar or G-3 Bass NECK Pickup 5 50
Miami, Florida, 331**, UNITED STATES OF AMERICA
$280
Sales tax will be added by ebay. I will ship most of my items to many countries other than... more
Gibson 1960's era EBO Sidewinder Bass Pickup with Black Cover
Dunnellon, Florida, 344**, UNITED STATES OF AMERICA
$280
Vintage 1970's Gibson S-1 Guitar or G-3 Bass BRIDGE Pickup 5 348
Miami, Florida, 331**, UNITED STATES OF AMERICA
$280
Sales tax will be added by ebay. I will ship most of my items to many countries other than USA, but I ask that all buyers ... more
Gibson 1960s Chrome EB-3 Bass mini-Humbucker Bridge Pickup
Brooklyn, New York, 112**, UNITED STATES OF AMERICA
$283
6 87K Lead Length: Approximately 7 inches.
ORIGINAL Black Patent No. 2, 737, 842 sticker on the bottom
Comes with original mounting Bolts and springs
SHIPPED FULLY INSURED... more
Vintage 1970's Gibson EB-0 EB-3 or EB-2 Bass Neck Pickup
Miami, Florida, 331**, UNITED STATES OF AMERICA
$300
Sales tax will be added by ebay. I will ship most of my items to many countries other than USA, but I ask that all buyers contact me before making a purchase. Foreign buyers are responsible for all of their taxes and customs duties. I will NOT declare lower values or declare items as gifts under any ... more
Vintage early-mid 1970's Gibson EB-2 or EB-3 Bass BRIDGE Pickup 5 96
Miami, Florida, 331**, UNITED STATES OF AMERICA
$300
Sales tax will be added by ebay. I will ship most of my items to many countries other than USA, but I ask that all buyers contact me before making a purchase. Foreign buyers are responsible for all of their taxes and customs duties. I will NOT declare lower values or ... more